mpirun --allow-run-as-root --report-bindings --prefix /usr/local/openmpi -bind-to none -np 8 -H 10.8.15.140:4,10.8.15.142:4  -x NCCL_SOCKET_IFNAME=bond0 -x NCCL_IB_DISABLE=0 -x NCCL_ALGO=Ring -x CUDA_DEVICES_ORDER=PCI_BUS_ID  -x NCCL_IB_GID_INDEX=3   -x LD_LIBRARY_PATH -mca plm_rsh_args '-p 10022'  -mca btl_tcp_if_include bond0  ./all_reduce_perf -b 8 -e 1G -f 2 -g 1